34 lines
1.4 KiB
Python
34 lines
1.4 KiB
Python
# =============================================================================
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# Copyright (C) 2019 Ryan Holmes
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#
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# This file is part of pyfa.
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#
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# pyfa is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# pyfa is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with pyfa. If not, see <http://www.gnu.org/licenses/>.
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# =============================================================================
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def calculateRangeFactor(srcOptimalRange, srcFalloffRange, distance, restrictedRange=True):
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"""Range strength/chance factor, applicable to guns, ewar, RRs, etc."""
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if distance is None:
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return 1
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if srcFalloffRange > 0:
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# Most modules cannot be activated when at 3x falloff range, with few exceptions like guns
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if restrictedRange and distance > srcOptimalRange + 3 * srcFalloffRange:
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return 0
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return 0.5 ** ((max(0, distance - srcOptimalRange) / srcFalloffRange) ** 2)
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elif distance <= srcOptimalRange:
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return 1
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else:
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return 0
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